... 滚动支架 roller trestle 桁架式支架 trussed trestle 常年不间断供汽（热） year-round steam（heat）supply ...
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桁架式支架
Truss type support
以上为机器翻译结果，长、整句建议使用 人工翻译 。
主拱为桁架式双拱肋，钢管拱纵向分13段制造，采用无支架缆索吊机安装、钢绞线斜拉扣挂施工。
The steel pipe arch was manufactured in 13 segments vertically, erected by cable crane without support and clasped by diagonal tension steel strand.
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